1. I know what you mean what represents an art. I'm not saying that an art isn't effective due to teachers. I'm basing it only on experience. I stated before that the techniques taught to me were useless mostly because they don't properly drill it. Most of the time they drill it for only a day.
2. How does one apply a disarm technique. Or a grapple technique especially when everyone in my family are too busy? The only things I do is I hit the bags and (used to) hit the wooden dummy on my own time whenever I have the chance. From my understanding, taking techniques from school requires one other person. Something that no one in my family has the time for.
3. I know what you mean by where one art isn't more effective than another. But you don't honestly believe that a guy that only knows kicking can take down another guy that knows how to punch, kick, elbow, grapple, and clinch? I know some taekwondo organizations like ITF incorporates punching if that's what you're talking about.
4. Every martial art has risk. Sure. That is if we're talking about Brain damage here. Kendo,fencing,HEMA,BJJ, (mabye) Judo, (mabye) aikido would beg the differ.
5. If someone punched me in the face then I did something wrong. That's why I mentioned to you before that I want to learn the mental side of self defense. Besides getting attacked from behind is something you're not MEANT to be prepared for anyways. It's not about being tough or "dealing" with it.
I've been punched before IN SPARRING but does that mean I will get used to getting hit from behind IN PUBLIC? No, that's not how it works.
1. You have very little experience to draw on, based on everything you've said.
2. Find a training partner / go through the moves / research and think about application. Having a partner is best, but not the only way of doing homework.
3. If someone only knows kicking, they don't know TKD. At all really. They might know the Olympic style game, but that's it.
4. You keep on about brain damage like everyone who participates is guaranteed to end up a vegetable. It's a risk with anything - grappling arts you could misjudge and hit your head, running for the bus you could slip and hit your head...
5. If you think any art at all can guarantee you'll not get hit unless you do something wrong, then you've either been drastically misled or you've watched too many films.
I never said from behind. If someone squares up to you face to face and you accept the fight, you're probably going to get hit. These "end a fight in 3 seconds with one technique" ads are absolute balls. All of them. If that's what you want, you need virtual reality.
Think how hard a boxer can punch, they almost never win with one hit, especially without taking a few themselves.